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mmc: omap: remove clock rate hard coding

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MMC master clock rate can vary for each instance of the MMC controller
on the device. Use clk_get_rate instead to get the value.

Signed-off-by: Balaji TK  <balajitk@ti.com>
Reviewed-by: Venkatraman S <svenkatr@ti.com>
Tested-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Balaji TK 2011-12-20 15:12:00 +05:30 committed by Chris Ball
parent 699834045f
commit d83b6e035f
1 changed files with 3 additions and 4 deletions
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7
drivers/mmc/host/omap_hsmmc.c
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@ -120,7 +120,6 @@
#define MMC_AUTOSUSPEND_DELAY 100
#define MMC_TIMEOUT_MS 20
#define OMAP_MMC_MASTER_CLOCK 96000000
#define OMAP_MMC_MIN_CLOCK 400000
#define OMAP_MMC_MAX_CLOCK 52000000
#define DRIVER_NAME "omap_hsmmc"
@ -598,12 +597,12 @@ static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host)
}
/* Calculate divisor for the given clock frequency */
static u16 calc_divisor(struct mmc_ios *ios)
static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios)
{
u16 dsor = 0;
if (ios->clock) {
dsor = DIV_ROUND_UP(OMAP_MMC_MASTER_CLOCK, ios->clock);
dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock);
if (dsor > 250)
dsor = 250;
}
@ -623,7 +622,7 @@ static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host)
regval = OMAP_HSMMC_READ(host->base, SYSCTL);
regval = regval & ~(CLKD_MASK | DTO_MASK);
regval = regval | (calc_divisor(ios) << 6) | (DTO << 16);
regval = regval | (calc_divisor(host, ios) << 6) | (DTO << 16);
OMAP_HSMMC_WRITE(host->base, SYSCTL, regval);
OMAP_HSMMC_WRITE(host->base, SYSCTL,
OMAP_HSMMC_READ(host->base, SYSCTL) | ICE);